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(11) | EP 0 428 128 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Magneto-optical recording medium |
| (57) A magneto-optical recording medium having a substrate (1) and a magnetic layer composed
of at least a recording layer (3) and a supporting layer (4) and being capable of
retrieving information by utilizing the fact that when it is irradiated with a laser
beam it produces the magneto-optical effect which affects its reflected light, characterized
in that the recording layer (3) has a lower Curie temperature than has the supporting
layer (4) and the recording layer (3) is thin enough for the laser beam to pass through. A magneto-optical recording medium as defined above, wherein the supporting layer (4) is composed of a first supporting layer and a second supporting layer, and the recording layer (3), the first supporting layer, and the second supporting layer have Curie temperatures of T₁, T₂, and T₃, respectively, which satisfy the following relationship. T₁ < T₂ and T₂ ≧ T₃ A magneto-optical recording medium defined as above, wherein the recording layer (3) has a higher Curie temperature than has the supporting layer (4). Owing to the above-mentioned features, the magneto-optical recording media of the present invention are capable of overwriting and have improved recording sensitivity. |